/*
 * Copyright 2000, Georges-Edouard Berenger. All rights reserved.
 * Distributed under the terms of the MIT License.
 */


#include "PriorityMenu.h"
#include "ProcessController.h"

#include <Catalog.h>
#include <MenuItem.h>
#include <Window.h>

#include <stdio.h>

#undef B_TRANSLATION_CONTEXT
#define B_TRANSLATION_CONTEXT "ProcessController"

PriorityMenu::PriorityMenu(thread_id thread, int32 priority)
	: BMenu(B_EMPTY_STRING),
	fThreadID(thread),
	fPriority(priority)
{
}


void
PriorityMenu::Update(int32 priority)
{
	if (priority != fPriority && CountItems() > 0)
		RemoveItems(0, CountItems(), true);
	if (CountItems() < 1)
		BuildMenu();

	fPriority = priority;
}


typedef struct {
	const char*	name;
	long		priority;
} PriorityRec;

static PriorityRec	priorities[] = {
	{ B_TRANSLATE("Idle priority"),	0 },
	{ B_TRANSLATE("Lowest active priority"), 1 },
	{ B_TRANSLATE("Low priority"), 5 },
	{ B_TRANSLATE("Normal priority"), 10 },
	{ B_TRANSLATE("Display priority"), 15 },
	{ B_TRANSLATE("Urgent display priority"), 20 },
	{ B_TRANSLATE("Real-time display priority"), 100 },
	{ B_TRANSLATE("Urgent priority"), 110 },
	{ B_TRANSLATE("Real-time priority"), 120 },
	{ "",	-1 }
};

PriorityRec customPriority = { B_TRANSLATE("Custom priority"), 0 };


void
PriorityMenu::BuildMenu()
{
	BMenuItem* item;
	BMessage* message;
	long found = false;

	for (long index = 0; ; index++) {
		PriorityRec	*priority = &priorities[index];
		if (priority->priority < 0)
			break;
		if (!found && fPriority < priority->priority) {
			priority = &customPriority;
			priority->priority = fPriority;
			index--;
		}
		message = new BMessage('PrTh');
		message->AddInt32("thread", fThreadID);
		message->AddInt32("priority", priority->priority);
		BString name;
		const size_t size = B_OS_NAME_LENGTH * 4;
		snprintf(name.LockBuffer(size), size,
			"%s [%d]", priority->name, (int)priority->priority);
		name.UnlockBuffer();
		item = new BMenuItem(name.String(), message);
		item->SetTarget(gPCView);
		if (fPriority == priority->priority)
			found = true, item->SetMarked(true);
		AddItem(item);
	}
}